Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung tam, tran tuan, truong thanh
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((trung tuan) OR (trung thanh)) dang cong san ((phan cau) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - hanh ((trung tuan) OR (trung thanh)) dang cong san ((phan cau) or (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((trung tuan) OR (trung thanh)) dang cong san ((phan cau) or (phan cac))*.